<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8"/>
    <title>Title</title>
</head>
<body>
<form method="post" action="login">
    用户名<input name="username" type="text">
    密码<input name="password" type="password">
    <button type="submit">登陆</button>
</form>
</body>
</html>